The purpose of this research study is to determine whether taking either of two low dose drugs that would prevent new blood vessels from growing after stem cell transplant is feasible, and what the side effects of taking each of these drugs after autologous transplant might be. The reason the investigators are looking at these drugs is because one of the things that allows tumors to grow quickly is their ability to stimulate the growth of new blood vessels. By suppressing the growth of new blood vessels after stem cell transplant, the investigators hope to prevent the tumors from coming back or continuing to grow.

Cyclophosphamide will be given PO once daily at 2.5 mg/kg/day for children < 40kg or 100 mg daily for children > 40kg beginning Day + 30 (30 days post transplant) and continue until at least Day +86

Drug: Metronomic Cyclophosphamide

Other Names:

Cytoxan®

CPM

Experimental: Thalidomide

Thalidomide will be initiated at 3mg/kg PO daily beginning Day + 30 (30 days post transplant) and continue until Day +86

Drug: Thalidomide

Other Name: Thalomid®

Eligibility

Ages Eligible for Study:

1 Year to 21 Years

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Patient must have an original diagnosis, benefited by autologous transplantation, confirmed by biopsy* of high-grade glial tumor, low-grade glial tumor, ependymoma, medulloblastoma, primitive neuro-ectodermal tumor (PNET), Wilms' tumor, rhabdomyosarcoma, Ewing's sarcoma, retinoblastoma, or miscellaneous poor-prognosis solid tumors. Lymphomas and other lymphoid malignancies will not be studied in this protocol.

* Brain stem glioma patients who have progressed after radiation therapy do not require histologic confirmation. Brain stem gliomas are defined as intrinsic tumors of the pons causing diffuse enlargement. These patients are diagnosed on clinical and radiographic appearance of the lesion and the biopsy requirement will be waived for this group.

Patient must be ≥ 1 years of age and ≤ 21 years of age at the time of study entry.

Patient must have a Karnofsky performance status or Lansky* play status ≥ 50

* For purpose of determining performance scores, wheelchair-bound patients will be considered ambulatory.

Patient must have an adequate supply of stem cells for transplant harvested prior to study enrollment, with adequate supply defined as 3 x 106 CD34+ cells/kg for peripheral blood stem cells (PBSC). Cell mobilization method will be left up to the treating physician's discretion and may include mobilization growth factor alone or mobilization after chemotherapy. If patient is unable to mobilize the proper amount of peripheral stem cells, bone marrow may be harvested as the source of hematopoietic stem cells. In this instance, 3 x 108 mononuclear cells/kg will be considered adequate. If necessary, a combination of peripheral stem cells and bone marrow can be used.

The Schwartz formula is an estimated glomerular filtration rate in children based upon serum creatinine and height. Height (Ht) should be measured in cm and serum creatinine (Cr) in mg/dL. Proportionality constant (k) is 0.55 for children and adolescent girls and 0.7 for adolescent boys aged 13-21. This constant is based upon a series of evaluations performed by Schwartz. Formula: GFR= (k x Ht)/Cr

If female of childbearing potential (defined as menstruating or amenorrheic from previous medical treatments), the following guidelines must be adhered to:

If enrolled in Arm III of this study, patient must be registered at the Celgene S.T.E.P.S. ® Program.

If enrolled in Arm III of this study, patient must be willing to practice birth control as outlined in the S.T.E.P.S. Program from the beginning of the study until at least 4 weeks following discontinuation of thalidomide therapy. Two reliable forms of contraception must be used simultaneously unless continuous abstinence from heterosexual sexual contact is chosen. Contraceptive methods must include at least one highly effective method (e.g. oral contraceptive pills, injections, hormonal patches, IUD, or implants), AND one additional effective barrier method (e.g. latex condom, diaphragm, cervical cap). If hormonal or IUD contraception is medically contraindicated, another highly effective method or two barrier methods must be used at the same time.

Pregnancy surveillance:

Patient must have a negative in office pregnancy test sensitive to within 50 mIU/mL (serum or urine) within 24 hours of beginning thalidomide even if continuous abstinence is the preferred method of birth control.

A pregnancy test must be performed weekly during the first 4 weeks of therapy and repeated monthly for patients with regular menses or every 2 weeks for patients with irregular menses

Negative pregnancy tests are valid for only 7 days.

If irregular bleeding or skipped menses, pregnancy test should be performed and pregnancy counseling given.

If pregnancy occurs during treatment, thalidomide must be immediately discontinued. Any suspected lethal exposure must be reported immediately to Celgene Customer Care Center at 1-888-423-5346, and the patient referred to an OB/GYN experienced in reproductive toxicity for further evaluation and counseling.

Patient (or legally authorized representative) must be able to understand and willing to sign a written informed consent document.

Exclusion Criteria:

Patient must not have any active, uncontrolled cardiac, hepatic, renal, or psychiatric disease defined as ≥ grade 3 based on NCI Common Terminology Criteria for Adverse Events v4.0 (CTCAE).

Patient must not be receiving any other investigational agents.

Patient must not have any active infection or concurrent illness obscuring toxicity or dangerously altering drug metabolism.

Patient must not have any thromboembolic event (deep vein thrombosis or pulmonary embolism) less than 3 weeks prior to enrollment.

Patient must not have a history of allergic reactions attributed to compounds of similar chemical or biologic composition to any of the agents used in the study.

Patient must not be pregnant or breastfeeding.

Inclusion of Women and Minorities

-Both men and women and members of all races and ethnic groups are eligible for this trial.

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01661400